Rockwell Automation 6008-SV2R VMEbus remote I/O Scanner - Manual (Page 34)

Chapter
Addressing I/O
3
3Ć5
32Ćpoint examples
1Ćslot addressing
(1 I/O chassis slot = 1 I/O group = 1 input image word and 1 output
image word = 16 input bits and 16 output bits.)
0
1
2
3
4
5
6
7
Output Image Table
Word #
0
1
2
3
4
5
6
7
Input Image Table
Word #
scanner memory
Rack x
00 17 bits
00 17 bits
ЙЙЙЙЙЙЙЙЙ
ЙЙЙЙЙЙЙЙЙ
ЙЙЙЙЙЙЙЙЙ
ЙЙЙЙЙЙЙЙЙ
Group 0 Group 1
32Ćpoint output module
32Ćpoint input module
ЙЙЙЙЙЙЙЙЙ
ЙЙЙЙЙЙЙЙЙ
32Ćpoint I/O modules use the entire word
of their group and borrow the entire word
of the next group. See ➀.
Since the module is in group 0 and the
inputs for group 0 and group 1 are used,
you must:
• install an output module in group 1, or
• leave the slot empty
Group 0
32Ćpoint input module
Since the input image table for group 1 is unavailable because it is
being used by the input module of group 0, installing a 32Ćpoint output
module makes use of output image table of group 0 and 1. See ➁.
You can also install 8Ć or 16Ćpoint output modules. But you cannot
install another input module since all the input image space for groups
0 and 1 is used by the input module of group 0.
➁
➀
0 1
0 1